BallinMiatch

iTrader: (1)

has any one ever flooded their engine in 6th gear. i went on my first road trip in the 99 camaro ss. Threw it in 6th gear to try and save some gas then all the sudden she started boggin down and eventually cut off. I tryed sarted it up right away wasnt happening. Waited 15 minutes started her up she worked fine ran like a champ and since then have had it in 5th gear and 5th gear only. Still 5 hours of drive left.

02WS6SSZ71

iTrader: (20)

Sounds more electrical to me. If your car "floods" just running down the highway there is something major wrong with your tune. Give us some more about what the car did when it died. Mods to the car?

teke184

iTrader: (5)

what RPM where you at when you shifted.

i run 6th gear at anything over 55mph....always have.

chadaclysm

Yeah, sounds like you were in 6th too early. It is a massive overdrive gear and you can't run it at too low of an rpm or you definitely will bog. But maybe not.... we need more info like how fast were you going?

eseibel67

iTrader: (10)

In 6th gear at 50 MPH, the engine will revolve at 1100 RPM. LS1 has plently of grunt to handle low speed. Certainly he wasn't going any slower than that.

teke184

iTrader: (5)

only if you're on flat ground and not needing to accelerate.

1100 rpm is ******* it a bit too much for my taste.

i mean 1600 rpm is NOT very high, and the car likes it much more

i've found that on a local trip i do regularly, where its all 45-55mph with lots of moving up and down between those speeds (traffic etc)....that i get the same gas mileage if not better if i just run in 5th gear. rather than constantly shift back and forth, or dog it down in 6th.

at some point the engine has to use more throttle to maintain a speed in a higher gear, than it does cruising along at a more efficient, albeit higher, rpm.

BallinMiatch

iTrader: (1)

well i was doing about 65 or 70mph. Cruise control was on and i needed to slow down so i pushed the clutch in to turn the cruise control off and when i did that that when she started dying down as soon as i tryed accelerating again. Fear of it happening again i drove the rest of the way down to florida in 5th gear not going over 2500rpm. Light on the mods tru duals no cats and a program just no idea what that guy had programed in the car when i got it.

johnnybravo

Generally, you push the brake or use the switch on the cruise controls (on the turn signal lever). I've ever heard of pushing in the clutch to turn off the cruise. Maybe that had something to do with it.

teke184

iTrader: (5)

i do it all the time. you just have to tap the clutch. don't even have to disengage it.

Mike454SS

iTrader: (4)

If you tap the clutch pedal just off the top of it's travel, it disengages the cruise without turning on your brake lights, and without clearing the stored speed, so resume works. If you use the controls on the turn signal level to disengage it, you also clear the stored speed, and if you use the brake pedal, you turn the brake lights on.

The cruise also has absolutely NOTHING to do with the PCM on a 4th gen F-Body. The vehicle speed is sent to the cruise box, and it pulls the throttle cable as much as it needs to in order to maintain that speed.

Sounds to me like something is seriously wrong with your cars tune, or you have a serious electrical problem (damaged wires or damaged/broken sensors). What happens if you drive at similar RPM in 3rd or 4th gear?...does the car have any throttle response and any power in that RPM range.

johnnybravo

Hey, thanks. I had no idea. That's good to know.

mediocrels1

only time im ever in 6th is when going upwards of 70...but i live in a pretty hilly area

Mike454SS

iTrader: (4)

With stock 3.42's, I will usually not put it into 6th until I'm above 60, but I'll let it get down to 50ish before I bother to downshift...and I see TONS of hills too...but I have a stock cam, not sure if you do...if I had a cam that liked to rev higher...I'd probably want to go to a 3.90ish gear so I could use 6th in the same MPH ranges.

mediocrels1

yup stock rear end...stock cam aswell. 50?! dam what are the revs at in 6th going 50? i dont think ive ever even done that before...i like to keep the revs no lower than 1900 when im cruisin on the freeway

teke184

iTrader: (5)

1900!!

jeezus man!

50mph is ~1100rpm in 6th assuming stock rear/tires
55mph is 1200 which is where i draw the line. although even with a cam the car still moves along just fine on flat land at that speed.

if you're just on the highway...why would you wait till 70 to shift to high gear? why on earth would you WANT to run the car at 2200rpm when you can run at a nice smooth/quiet/efficient 1500rpm??

KENS_SS_4

Whats wrong with cruising at 2200? Thats where I cruise all the time, of course I am in 6th gear moving along briskly (I got 24 mpg on a trip that was 3 hours long and covered 300 miles). I love it when the wife falls asleep.

01ssreda4

iTrader: (96)

with an auto I cruise at over 2500 most of the time on the hwy. Its a **** of a lot better for your enigine then lugging it at low rpm with the high load of 6th gear. Thats right up there with one of the worst things you can do to beat down the inside of your engine.

slayerized6

iTrader: (12)

6th gear i try to stay at 1700rpm minimum..thats about 70mph. gotta love 3.73's (sarcasm)

teke184

iTrader: (5)

at 1500 rpm the engine isn't lugging down.

1200...yeah

Mike454SS

iTrader: (4)

I never lug my engine...if what I do to it is destroying it, then why does it have almost 180K on it, and still runs just like it's brand new?

It also gets 30 mpg on the highway all the time.

Cruising over 2500 with an auto...is one of several reasons why auto's suck...once you throw a set of gears at the car, your highway RPM becomes stupid...all that 2500+ RPM is doing is generating more heat in your engine and wasting fuel.

They would NOT build the car to go the RPM is goes stock at the speed limit (65 mph in most states) on the highway in 6th gear if that RPM was going to hurt it...they also wouldn't make that happen at the minimum safe RPM either. It's not like I pull up a hill in 6th at 50...but if traffic slows down and the pavement is level or downhill, and I can see it picking the pace right back up, I will absolutely leave it in 6th and let come back up with mph, smoothly...because it isn't lugging.

Let me ask you this, what RPM do you turn at 35-40 mph? What gear do you let the car use? If it's a stock gear T56 car, that speed should be in 5th gear.